package GUI;

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

public class TestKey {

public static void main(String[] args) {

new KeyFrame().launchFrame();

}

}

class KeyFrame extends Frame {

public void launchFrame() {

JFrame frame = new JFrame("BorderLayoutDemo");

frame.setBounds(500, 200, 300, 300);

frame.setLayout(new BorderLayout(10, 10));

JButton b1 = new JButton("Up");

frame.add(b1, BorderLayout.NORTH);

b1.addKeyListener(new MyKeyMonitor());

JButton b2 = new JButton("Right");

frame.add(b2, BorderLayout.EAST);

b2.addKeyListener(new MyKeyMonitor());

JButton b3 = new JButton("Down");

frame.add(b3, BorderLayout.SOUTH);

b3.addKeyListener(new MyKeyMonitor());

JButton b4 = new JButton("Left");

frame.add(b4, BorderLayout.WEST);

b4.addKeyListener(new MyKeyMonitor());

frame.add(new JButton("Centre"));

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//关闭窗口

frame.setVisible(true);

}

class MyKeyMonitor extends KeyAdapter {

public void keyPressed(KeyEvent e) {

int keyCode = e.getKeyCode();

if(keyCode == KeyEvent.VK_UP) {

System.out.println("上");

}

if(keyCode == KeyEvent.VK_DOWN) {

System.out.println("下");

}

if(keyCode == KeyEvent.VK_LEFT) {

System.out.println("左");

}

if(keyCode == KeyEvent.VK_RIGHT) {

System.out.println("右");

}

}

}

}